The SX600 measures forward and reflected power and VSWR. Compact size makes meter useful for testing both base and mobile installations. Two directional couplers [one for HF, the other for VHF/UHF] with switch and LED indicators for in-line connection of two transceivers. Special Features: Illuminated meter Switchable r.m.s. or peak power Measures forward, reflected & VSWR power 6"W x 2"H x 4"D, 2 lbs. Specifications: Frequency: 1.8-160/140-525 MHz Power Ranges: 5/20/200 Connector: SO-239 Min. Power SWR Test.  This unit comes complete with manual and DC power cable.